Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What is Rack awareness?

956

How will format the HDFS ?

956

what are the steps involved in commissioning adding

877

How to use Apache Zookeeper command line interface?

1079

Can NameNode and DataNode be a commodity hardware?

1642

What are the steps to submit a Hadoop job?

872

What is the heartbeat used for?

1004

How would you tackle counting words in several text documents?

985

What are the Basics of Hadoop?

889

Explain the shuffle?

862

How blocks are distributed among all data nodes for a particular chunk of data?

1050

How can I install Cloudera VM in my system?

913

How we can take Hadoop out of Safe Mode?

IBM,

824

What is Writable & WritableComparable interface?

897

What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

1034

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Un-Answered Questions { Apache Hadoop }

What is version-id mismatch error in hadoop?

1020

Do we need to give a password, even if the key is added in ssh?

689

How the Client communicates with HDFS?

1017

Explain the features of stand alone (local) mode?

583

Explain why the name ‘hadoop’?

651

Explain the shuffle?

862

What exactly is hadoop?

646

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1067

What is the Use of SSH in Hadoop ?

928

How many instances of JobTracker can run on a Hadoop Cluser?

974

What is inputsplit in hadoop? Explain.

733

What is difference between regular file system and HDFS?

998

What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

679

Define a datanode?

597

Explain the difference between NameNode

888

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